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Sharpless Sh2-101 (accidental), astropical
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Sharpless Sh2-101 (accidental)

Getting plate-solving status, please wait...
Sharpless Sh2-101 (accidental), astropical
Powered byPixInsight

Sharpless Sh2-101 (accidental)

Equipment

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Acquisition details

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Description

Last night I abused the Sammy 135mm at f2.0 for autoguiding with an IMX178 monochrome camera. Oh boy, what a wonderful AG gear, never before did I see such pinpoint stars, easy to focus with high SNR in PHD2 while the guide curve was exquisite. With so much luxury I could have dared 5 minute exposures.

This time I employed the small Ø71mm/450mm Quad APO mated with a modified DSLR and as I overlooked that the optical axes of AG scope and main scope were not mounted in parallel, plate solving worked only for the AG scope and instead of the intended Crescent Nebula the APO lens saw SH2-101 near η Cygni, my first Sharpless object ever (focus was sharp though). Shamelessly only 14 lights, but 20 calibration files each. 

Rev B: The second so missed target object was the Wizard Nebula but I got another very faint HII region near cluster NGC 7419, but at least I was in the right constellation of Cepheus. The missed Wizard Nebula is lurking at the bottom left. Same image acquisition properties but 76 lights.

Lesson learned: be more careful when fumbling in the dark! Thunderstorm today.

Comments

Revisions

  • Final
    Sharpless Sh2-101 (accidental), astropical
    Original
  • Sharpless Sh2-101 (accidental), astropical
    B

B

Title: Second Accident

Description: Unnamed HII emission nebula

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Sharpless Sh2-101 (accidental), astropical